2 pack or petrolproof rattlecan paint

[madmog]

Happens to be for a motorbike but could equally be for any painted area near the petrol filler.

I've recently painted up a petrol tank with cellulose and cellulose lacquer but the petrol is slightly affecting the paint. Looks like a stain or discolouration but is in the paint. You can feel it with your fingernail.

I asked at the local paint suppliers and they said a can of 2 pack aerosol would be petrol proof and I bought one. It says 2K on it but I was looking at youtube vid of paint techniques the other day and the author showed that his 2K aerosol had a button underneath that activated the paint and then you had so long to use it as it was activated.

So: Is a 2K lacquer the best way to petrol-proof paint?

Is it possible for the can I have to be a 2K given that there is no activator button underneath?

I've seen mention of a Halfords petrol-resistant lacquer but have heard bad experiences about it.

Or am I barking up the wrong tree and the answer is something else entirely?

Also is the paint affected area something I can scotchbrite and repaint or is it a back to bare metal job as the paint would be compromised?

Many thanks

[stealthstylz]

It's called 2 pack because the paint and hardener are separate and have to be mixed together. IIRC it dries in a sealed container so can't see how it could be pre mixed in an aerosol.

[madmog]

Jul 4, 2013 0:47:40 GMT stealthstylz said:

It's called 2 pack because the paint and hardener are separate and have to be mixed together. IIRC it dries in a sealed container so can't see how it could be pre mixed in an aerosol.

That's what I thought. I'd heard about the ones that have a button and then you are on the clock to use it as it's hardening in the can but don't know how it would work without a specific activation. Hmm

[Mr S]

Had a quick google and came up with this for how 2K in a can works!

www.capellasolutionsgroup.com/section/2KAEROSOLTECHNOLOGY

[penrhynrallycentre]

As painter by profesion I am intrigued to say the least,can see anyreason that it wont work as the activator will be mixed in tgh etin BUT it will defo be a one off job and throw away can after use


Dave

[madmog]

This is the same thing I picked up, has no 2nd button or ringpull.
www.ebay.co.uk/itm//110989464091

The only way I can imagine this could work is that there is a volatile oily substance holding the hardener and paint apart as an emulsion. The oily substance would evaporate leaving microscopic blobs of hardener and paint touching and reacting. But it doesn't seem likely to me.

[dallow]

Why not use normal 2k paint ? I recently painted my boat with 2k paint using a mini roller, i didnt fancy trying to spray it because i didnt have access to a booth, it went on lovely ! there were a few air bubbles in the the paint which was caused by over rolling but these flatted back with no problems

[madmog]

I'd never thought of that.

[mikeymk]

I have staining behind my carbs from spitback onto the panel. It's now a completely different colour there. This was done 2K.

I'd never recommend rattle can even though it can be wet-flatted smooth and then buffed to a glass finish, simply because they make them in batches so a bag of cans are gonna be different shades!
But if you can get 2-3 cans with the same batch number, that will be enough for the final coat on the bike, it's the same shade. Winner!

Now if that paint isn't gonna change colour when it gets petrol on it..? Well then you've just given me the answer to my prayers! I can get a far closer match in rattle can than the mess it's turned into.. Cheers!

[joostvdw]

It IS possible to get pre-mixed 2K laquer in rattle cans, but it cannot be off the shelf and the person selling it should tell you it only keeps 1 day at maximum. I've had mixed results so getting a can that you can mix yourself (with a 2nd button for instance) would have my preference.

[madmog]

Jul 16, 2013 22:06:28 GMT mikeymk said:

I have staining behind my carbs from spitback onto the panel. It's now a completely different colour there. This was done 2K.

I'd never recommend rattle can even though it can be wet-flatted smooth and then buffed to a glass finish, simply because they make them in batches so a bag of cans are gonna be different shades!
But if you can get 2-3 cans with the same batch number, that will be enough for the final coat on the bike, it's the same shade. Winner!

Now if that paint isn't gonna change colour when it gets petrol on it..? Well then you've just given me the answer to my prayers! I can get a far closer match in rattle can than the mess it's turned into.. Cheers!

In terms of spitback, that suggests 2K is not petrol-proof. I don't know if it is or not. Is the different colour a greasy dried petrol gunk that can be cleaned off or has the shade been chemically changed by the petrol?

As for the batch numbers, for my petrol tank, I would just clear coat over the existing colour so the colour match wouldn't be an issue. Perhaps the same for your engine bay, clean back the paint, t-cut or whatever to get the correct colour back then clear coat as a barrier. But only if the 2K is spit-back proof.

[mikeymk]

I was thinking about the paint used in the respray but i've missed a rather important technicality - it's the original paint in the engine bay.. (only the outside of the car was blown over after i re-shelled the red one for a blue one), the affected area was painted by VW in Wolfsburg in 1985. So whatever that paint is, it's fully reacted, it's gone a pretty fetching shade of green and no amount of T-Cut is gonna make a difference.

This was before the water based paint they soon went on to use.